Density functions in high-dimensional basket options

We consider an important class of derivative contracts written on multiple assets (so-called spread options) which are traded on a wide range of financial markets. The present paper introduces a new approximation method of density functions arising in high-dimensional basket options which is based on applications of generalised Nyquist-Whitakker-Kotel'nikov-Shannon theorem we established. It is shown that the method of approximation we propose has an exponential rate of convergence in various situations.